Another math teacher here at Scattergood asked me at dinner, “What about trigonometry on other shapes, like ellipses?” We know about hyperbolic cosines, but what about other things?

I whipped up this geogebra applet. There are 3 green points you can find and drag – make sure you play with all three, because they’re pretty cool!

Very interesting – I particularly like your use of the ‘locus’ tool, which people often find quite mysterious. It would interesting to try to derive cartesian equations for some of your elliptic sines/cosines.

On another topic, I see you have picked exactly the same WordPress theme as me — got me very confused when I clicked on the link: ‘I don’t remember writing this…’!

Thanks for the comments, guys – I really like geogebra, and I think it’s a vital tool for math teachers. What else is so powerful but easy enough for students to learn?

I’ll be happy to detail answers to any geogebra questions I can answer!

Very interesting – I particularly like your use of the ‘locus’ tool, which people often find quite mysterious. It would interesting to try to derive cartesian equations for some of your elliptic sines/cosines.

On another topic, I see you have picked exactly the same WordPress theme as me — got me very confused when I clicked on the link: ‘I don’t remember writing this…’!

I’d love to check this out, but for some reason the GGB applet keeps spooling. I like what you’re doing with the GeoGebra. Keep ’em coming.

Great work! I enjoy seeing what others are doing with GeoGebra, and I enjoy seeing other GeoGebra Nuts out there.

Way cool! Thank you!

Thanks for the comments, guys – I really like geogebra, and I think it’s a vital tool for math teachers. What else is so powerful but easy enough for students to learn?

I’ll be happy to detail answers to any geogebra questions I can answer!